The above particulars respecting the development of the human being have been narrated to show that one organ is just as important as another, and that each is really dependent upon the other; no one could exist without the other and all are to subserve a use. First must be the _esse_ (the inmost) the vital force imparted to the ovule. A little later certain changes take place in the ovule, later still other changes, and finally about the fifteenth day a slight development of the new human being can just be outlined by the help of the microscope, which, as before stated, has form at about the third week after conception. First the vestige of a head and body, a little later the heart and lungs appear lying in the open chest; then the hands are protruded from the sides of the trunk, afterwards the forearms, then the arms, all pushed out from the body; the feet and legs gradually protrude from the lower end of the trunk, and the chest closes up so that the heart and lungs can no longer be seen; the face, mouth and eyes take form, the external genital organs make their appearance in conjunction with other developments, and in due course of time the boy or girl is born ready for further developments in childhood, and adolescence. When the latter development has been attained, if due care has been taken by all interested parties, we have pure men and pure women fitted to enter upon the privileges and the _uses_ of a wedded life according to the design of our Creator. How wonderfully and how instructively are all organs in the animal body disposed and arranged! In the highest place we find the brain to govern and rule over all below. It is the first organ formed and in an orderly life should control all the others. Next in order and importance are the heart and lungs, which put into motion all other parts and enable the animal frame to continue in motion. So each and every organ is developed in its proper order, all to obey the commands of the first and most important--the brain, the seat of the reason and the will. Happy are they of either sex who will govern themselves by a pure enlightened reason and a pure affectionate will. CHAPTER II. The Infant. Embracing the First Year of the Child's Life.